While doing my Christmas shopping, I heard a lady looking for prom dresses. Prom in December? It is typically held near the end of the senior year.
In the United States, Canada and even here in the Philippines, a prom, short for promenade, is a formal (black tie) dance, or gathering of high school students. High school juniors attending the prom may call it Junior Prom while high school seniors may call it Senior Prom.
Anyway, I guess the lady was just looking for a dress for their Christmas Party.